Ext.ux.StaticTextField = Ext.extend(Ext.form.TextField, {
    fieldClass: 'x-static-text-field',

    onRender: function() {
        this.readOnly = true;
        this.disabled = !this.initialConfig.submitValue;
        Ext.ux.StaticTextField.superclass.onRender.apply(this, arguments);
    }
});

Ext.reg('statictextfield', Ext.ux.StaticTextField);